On Thu, Jul 28, 2011 at 10:45 AM, Matt Graham <danceswithcrows@usa.net> wrote:

What's in /etc/resolv.conf on the Ubuntu box? How does it differ from
whatever the equivalent is on the 'Doze VM? If resolv.conf contains

cat /etc/resolv.conf:

# Generated by NetworkManager
domain ves.com
search ves.com
nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 10.50.1.1

(I added 8.8.8.8, 8.8.4.4 in the network applet in hopes that would help)

WINDOWS VM: (inconfig /all)
Windows IP Configuration

   Primary Dns Suffix . . . . . . . :
   WINS Proxy Enabled. . . . . . . . : No
   DNS Suffix Search List. . . . . . : ves.com
   Connection-specific DNS Suffix . : ves.com
   DHCP Enabled. . . . . . . . . . . : Yes
   Link-local IPv6 Address . . . . . : fe80::91f9:7ec1:1741:4a21%11(Preferred)
   IPv4 Address. . . . . . . . . . . : 172.16.1.65(Preferred)
   Subnet Mask . . . . . . . . . . . : 255.255.254.0
   Lease Obtained. . . . . . . . . . : Friday, July 29, 2011 8:10:13 AM
   Lease Expires . . . . . . . . . . : Saturday, August 06, 2011 8:10:25 AM
   Default Gateway . . . . . . . . . : 172.16.1.1
   DHCP Server . . . . . . . . . . . : 172.16.1.15
   DHCPv6 IAID . . . . . . . . . . . : 235405351
   DHCPv6 Client DUID. . . . . . . . : 00-01-00-01-15-00-A3-D1-08-00-27-6D-83-66
   DNS Servers . . . . . . . . . . . : 10.50.1.1
   NetBIOS over Tcpip. . . . . . . . : Enabled

I trimmed this a bit, but left the IP6 info in there because I didn't think we actually had IP6 enabled on this LAN. One obvious difference is that there is only 1 DNS server listed in the windows config. That's because I had added 2 in ubuntu trying to get better performance.

search example.com
nameserver 1.2.3.4
nameserver 5.6.7.8

dig crow202.org 1.2.3.4 >> 131 ms response
dig crow202.org 5.6.7.8 >> 75 ms response

I'd never heard of the dig command before, and both seems to have use the 8.8.8.8 nameserver. I was hoping to check each nameserver this way, but I', not sure I'm doing it right. I looked up the command and tried using like this dig [nameserver] [record] as in dig 8.8.4.4 crow202.org, but it still seems to use the 8.8.8.8 nameserver.

dig crow202.org 8.8.8.8 >> 49 ms

...then can you do "dig crow202.org 1.2.3.4" and "dig crow202.org 5.6.7.8" and
get fast responses from both? If one nameserver is returning quickly and one
isn't returning at all, this could cause dumb things. IIRC, 'Doze boxes avoid
using a second nameserver if one exists, while Linux machines will use a
second and third. If a second nameserver is in the resolv.conf but isn't
*responding*, you could get long timeouts for DNS on Linux boxes for seemingly
inexplicable reasons.

It also might be worth making sure that there aren't any iptables rules
blocking port 53. This is unlikely, but easy to check.

Out of curiosity, I tried ping yahoo.com on both the windows vma and ubuntu. The ubuntu ping time was slight better but consistently better. ???

--

Matt G / Dances With Crows
The Crow202 Blog: http://crow202.org/wordpress/
There is no Darkness in Eternity/But only Light too dim for us to see

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